Not every cloud-based file storage solutions are made equal. Although almost each of them uses encryption to transmit and store your files, the devil is in the details.

Popular file storage services - such as Dropbox and Microsoft OneDrive - have access to the file decryption keys. In other words, their staff can and do access your files for things like detecting pirated media in your folders, or fulfiling law encforcement requests when being served with a warrant.

Fortunately, zero-knowledge, end-to-end encryption solves this problem. Your files are encrypted on your computer with an encryption key, before the files are uploaded to the cloud. As the key never leaves your computer, neither the cloud provider nor anyone else may access your files.

The following sections will walk you through the registration and configuration process of sync.com. It is an easy-to-use, zero-knowledge file storage solution that keeps your files secure and private.

You can synchornise the contents of a folder on your hard drive with sync.com by installing the client software.

Now open the Sync folder under your Documents folder and drag a file here

It is always a good idea to protect your important user accounts with two-factor authentication, in case your password is stolen by a backdoor on your computer.

In order to make this work, you must have Google Authenticator (Android, iPhone) installed on your smartphone.

The following cloud-based file storage solutions are not zero-knowledge solutions. Many of them are known to satisfy law enforcement requests as confirmed by the published transparency reports.

Image courtesy of Alex Weber